United StatesQuestion 110 (2025 list) · Recent American history
Why did the United States enter the Korean War?
- aBecause Japan attacked Pearl Harbor
- bTo stop the spread of communismCorrect answer
- cTo force the Iraqi military from Kuwait
- dBecause Germany attacked U.S. ships
Why?
The United States entered the Korean War in 1950 to stop the spread of communism after North Korea invaded South Korea.
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Source
Questions and answers: U.S. Citizenship and Immigration Services (USCIS), 128 Civics Questions and Answers (2025 version), M-1778, and Civics Questions and Answers (2008 version), rev. 08/21 — public domain. USCIS accepts other answers too; we show one of them. The wrong options and the explanations are ours. Not affiliated with or endorsed by USCIS.
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